Maybe a sort of resurrection spell due to it being a magical related death, would be my guess anyway i did a playthrough where i killed the boss and died and one where Morrigan got pregnant and absorbed it, and one where Theren logain or what ever he is called killed it.

All we can do is hope they have there usual standard for giving us a good story, so that the death thing is explained in the case where we die at the end.

I am an old gamer and i need my trainers to help me complete them these days so i have started to look at what trainer options i have for my games and Cheat happens tend to not disappoint so thank you for the game enjoyment i can still have.